The A9 Pro Max’s mph screen gets its speed data from the bike’s controller, which reads the wheel/motor rotation signals and sends the current speed to the display. The manual shows the display is a Bluetooth display and that it presents current speed in mph, so the screen is essentially receiving ride data from the bike’s control system, not measuring speed on its own.

How it works

  • The motor/controller system tracks motion from the wheel or hub sensor setup.
  • That data is transmitted to the handlebar display.
  • The display then shows current speed, trip distance, PAS level, and other riding info.

What the mph reading means

The mph number is an estimated real-time speed value based on the bike’s electronics, and it may vary slightly depending on tire size, sensor calibration, or display settings.

Bluetooth angle

The manual also shows the display can pair through the Key-Disp app, but Bluetooth is mainly for settings and PAS control rather than the basic live speed readout.

Practical takeaway

If the mph screen seems off, the usual things to check are:

  1. Wheel size settings in the display.
  2. Sensor connection.
  3. Whether the display/controller pairing is working properly.

TL;DR: the Aniioki A9 Pro Max gets mph info from the controller/sensor system and sends it to the display, which then shows your current speed.